15515225555 has 8 divisors (see below), whose sum is σ = 18635342544. Its totient is φ = 12400799200.

The previous prime is 15515225543. The next prime is 15515225569. The reversal of 15515225555 is 55552251551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15515225555 - 2¹⁰ = 15515224531 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1416656 + ... + 1427565.

It is an arithmetic number, because the mean of its divisors is an integer number (2329417818).

Almost surely, 2^15515225555 is an apocalyptic number.

15515225555 is a deficient number, since it is larger than the sum of its proper divisors (3120116989).

15515225555 is a wasteful number, since it uses less digits than its factorization.

15515225555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2845317.

The product of its digits is 312500, while the sum is 41.

The spelling of 15515225555 in words is "fifteen billion, five hundred fifteen million, two hundred twenty-five thousand, five hundred fifty-five".